Punch



March l2, 1929. M. F. BOLLAERT 1,704,962

PUNCH Filed April 6, 1927 5 Sheets-Sheet l wwf ATTORNEY March 12, 1929. M, F, BQLLAERT f 1,704,962

` PUNCH Filed April 6.. 1927 sI sheets-sheet 2 Fl E. Z.

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'ATTORNEY March l2, 1929. MQF. BOLLAERT PUNCH Filed April 6, 1927 s Sneetsfsheet 3 Patented Mar. 12, 1929.

NIT-ED sfr. TES

MEDARD F. BOLLAERT, OF OAKLAND, CALIFORNIA.

lriiNcH;

Appiiation ieanpn e. .i921 seriainp. 181,454.

This invention relates to improvements in punch holder in the construction and which.

holder is mounted in the frame and supported by a lined pivot upon whichfit'is adapted to l swing to position any one of its several punches. These punches preferably vary in size from, say, 35g to 3/4 in diameter, and are concentrically larranged in the holder relative to its fixed pivot and ai'eadapted for selective positioning vto yalign vany selected punch with the punch actuating mandrel.

Another novel feature of the invention is the peculiar construction and arrangement of punches in operative engagement with 'the l .Y

the punch actuating mandrel and its correlated actuating means. This actuating means consists of an eccentric and 'link mechanism,

n so designed and arranged as to increase the' leverage transmitted thereto by the hand op''v erating lever of the device, and in turn to transmit such power to the mandrel and se- Y lected punch.

The primary object of my. invention is toy provide a hand-operated punch of the vclass designated that embodies in its construction a rotatable punch` holder, yso arranged relative to-its support as to bring any selected 'one' of a plurality of punches of varying sizes intoV axial alignment and engagement lwith thel punch actuating mandrel ofthe apparatus. f Y

Another object of the inventionis to pro- 'f vide a punch that embodies in its construction a novel means for'positi'oning `and locking the punch holder in position jwith one of. its

punch actuating mandrel.

Still another object of the inventionis to provide a punch of tlie'class designatedlthat employs in its construction, a punch actuating mandrel having novel punchfengaging means formed for the reception of the punch heads as they are brought into alignment- 'therewith' through'the adjustment of thepunch carrierI or holder."

ing means in the form of links andS eecentrics which are combined with an operating handle insuch manner that thek leverage rof the handle is considerably increased, thus great-H ly adding to the operating efficiency of the apparatus.

i -1,1o4,962f gPair-Elar oFIFiCE. y

Other objects' and `adantages of my inven- I tion will be apparent with reference to the detailed ydescription which follows: l

A structure which is apreferred embodii ment of my invention is illustrated in the accompanying three sheets of drawings, form# ing a part ofltliis application, in which:

Figure 1 is a side elevation showing `a 'punch constructed in accordance with the 'principles of my invention ;f` 7 f Figure 2 is a front view of the same showing a punch positioned under the mandrel `and ready for use, a portion Vof onerpair of l operatin-geccentricsand links being brokenaway to show their construction and arrangeryment relativeV tothe operating handle and punch actuating mandrel of the apparatus;

Figure 8 is a greatly enlarged vertical sec-f tional 'detail taken on the line 3 3 of Figure 2 and illustratingin detail the operating handle, punch actuatingvmandrel and rotatable punch holder; i 7

Figure @Cisa horizontal sectional detail taken on the line of Figure 1 and illus'-` trates the arcuately arranged fixed punch guiding'fra'ine vand the punch holder which p is mounted for rotatable movement immediately thereunder; and y Figure 5 is a sectional detail of the punch holder retaining means which prevents movement of .the-punch holder after it has been properly positioned.v h Referring-in f greater `detail to' thedrawings, thel'numeral' 1() designates a rigid support. which is preferably constructed ofcast material and consists of afbase 11, upright support 12, lowerjaw 13, upper jaw 14 and intermediate clearance section 15.V The "intermediate arched sectionl formed between the jaws 13 and 14: is provided with a linished base 17 ofhoiizontal disposition, and thev table lsection 18 oftheV lower jaw is providedv with a finished upper face :disposed iii a common plane with that of the base 17.V

` A .vertical'bore '19 extends through the rear portion of the upper jaw 14 and/this bore is continued into the lower aw 13 in theforin of :y y ,l Y ablind bore 1'9.' A Apunch holder 20, Figs. Ancillary to the foregoingobjects is the-` Iprovision of a punch having a novel `actuat- 1, 2 kand4C,ism'o'unted between thebase 17 having a vertical bore 23, an integrally formedupper jaw 24 and a lower jaw 25` forming therebetween a slot 26 of sufficient width and depth to receive metalshcets 27 to be punched. The upper jaw 24 terminates in an arcuately disposed member 28 and the tive bores, and which punches are adaptedY for limited reciprocation within said bores as hereinafter described.

`The lower aw 25 is provided with a. plu? rality of dies'32 which are arranged in axial alignment with their corresponding punches i rotatable movement about a fixed pin- 3l, and `are tapped into openings 33 formed in the jaw 25 for their reception, as clearly shown in Figure 3 e The entire punch holder 2O is mounted fpi; uit: which is set tightly in the bores 19 vand 19 and projectsthrough the bore 23 of the supporting section 22 thereof. The bottom face of the 'section 22 of the holder rests upon the finished base 17 of the lowerjaw of the frame, and the under face of the sectionA 29 thereof slidingly contacts the ti ble sectionv 18 of the frame. Y Y i The pin 34Vis threaded adj acent its upper end and the upper end of the bore 19 is correspondingly threaded as indicated at 35, and l the upper end of the pin is provided with a squared portion 36 providing means for tightlyseating the pin in pla-ce.

jThe under face of the upper jaw 14 of the supporting frame 10 is finished to form a. horizontal planar surface 37, and the sides of said aw are provided with laterally disposed and nintegrally formed supporting flanges 38 and 39.

An arcuate tool guide frame 40 ,having a centrally disposed lug 41 is rigidly bolted to the planar surface 37 of the upper jaw 14, by

i, the bolts 42, and is additionally bolted-to the i Y pivot 34.

supporting flanges by the bolts 43, 1, 2 and 4. ASaid guide frame is provided with an arcuate` slot 44 extending from end to end thereof and is concentrically arranged relative to thepivot pin 34 of the tool holder 20.

` The Shanks of the punches 30 are adapted to The central sectionofthe guide frame. is

provided with anenlarged opening 4,5,li`igs V 3 `and 4, of slightly larger diameter than the mandrel 46and the slot- 44 formed in the Y, guide frame merges into'this opening.

A depending lugi47 is integrally formed-on the rear underside of the; guide frame and, extends into close proximity to the upper section 28 of the tool holderg20, buthas suf licient'elearance to allow of the free movement thereunder of said tool holder and acts as abrace to prevent cramping of the punches in their bores when they are withdrawn from thework by the mandrel 46. f

The mandrel 46 is provided at its lower end with an inverted Ushaped slot 48 normally disposed as shown in Figure 3 and adapted to receive the heads of the punches as they are carried from the guide slot 44 of the guide frame Vby the revolublemovement of the tool holder Any punch may be brought into position under the mandrel and into engage* ment with the mandrel slot 48,l by moving the tool holder 20 until the selected punch has been properly positioned, at which point one Aof .a series of radially positioned notches 49 formed on the underside of the section 29 of the tool holder is engaged by the spring controlled retaining ,dog 50, which dog is pivote ally mounted upon the side'of the lower jaw 13 of the support 10, as shown in Figures 2 and 5. The dog 50 tends to normally lock the tool holder against movement and when it is dcsired to select another punch this dog may be' tripped manually by pulling'it downV against the spring urge in the direction'of the arrow Figure 5. n A

i The mandrel 46 is mounted in a bore 5l of verticaldisposition which is formed in the upper jaw 14 of the support and said mandrel is adapted for limited reciprocal movement therein. The upper end of the mandrel is in the form of a T 52, and said T isy provided with a transverse bore 53 pin 54 extends.

A pair of depending links 55 and 56 are pivotally secured to the pin 54 and lic flush against `the side faces of the upper ljaw 14' of theV support, and are provided at their lower ends with openingsr57 and 58 which are adapted to receive inwardly projecting circular lugs 59 and`60 formed, respectively, on the arms 61 and V62 of the operating hand-le 63.

The lug`s159 and 60 are provided with aligne-d openings 64 and 65 which arey positioned` eccentrically therein relative lto their true centers, and'cap bolts 66 and 67 are inserted throughthese openings and tapped into opposite sides of the jaw 14, vas shown, in Figure 2, and form fixed pivot points aboutv which the lugs 59 and 60 arerotated bypulling the handle 63 towardthe operator of the punch; 1 Y

When the operating handle 63 is swung toward the operator as described, untilthe limit of the throw of thelugs59 and60 has been reached, the mandrel has been forced downwardly andcarries with it a positioned punch, the shearing edge of ywhich cuts ythrough the material 27 and entersthe die 32 inthe ordinary manner.

through which a Y The operatinghandle 4manually l :l

turned to normal position, as shown in Figs.

. moines and 3, and the operation is repeated with the same punch in the mandrel or a new punch is selected as desired. y

The punch bores 30 are each provided with notches 68 formed in the front portion ofthe section 28 of the tool holderand are dared outwardly to provide sight openings through which the operator is enabled to see the point of the punch to facilitate the positioning of thesame upon the material 4to be punched.

A notch 69 is cut in the front upper edge of the table 18 and forms a discharge chute for the cut material which is forced through the dies by the punches. K

The heads of the punches are round as shown in Figure 4 and readily slide through the slot 48 formed in the mandrel, although as shown in Figure 3, it is desirable that said slot. 48 should be somewhat larger than these heads to insure proper registration.

The slot 44 in the guide frame extends laterally on both sides ofthe device and is of suiiicient length on each side to accommodate all of the punches when swung to any particular side by lateral swinging movement of the tool holder, the limit of this movement being gauged in either direction by the angularly disposed rear faces 70 and 7l ofthe supporting section 22 of the tool holder. v

From the foregoing description taken in connection with the accompanying drawings, the advantages of the construction and method of operation will be readily understood by those skilled in the art to which the invention appertains, and while I have dcscribed the principle of operation, together with the device which I now consider to be the best embodiment. thereof, I desire to have it understood that the device'shown is mere ly illustrative and that such changes may be made, when desired, as fall within the scope of the appended claims.

Having thus described my invention, I claim as new and desire to secure by Letters Patent. of the United States the following:

l. In a punch of the class describeda U- shaped frame having the legs thereof horizontally disposed, one of said legs serving as the base, a U-shaped tool holder yof integral construction disposed Yhorizontally between the'legs of said frame, one of the legs of said tool holder having a segment integral therewith at the end thereof containing a plul rality of dies, the other leg vof said tool holder having a corresponding segment provided ywith a plurality of passages in which are positioned headed tools for cooperating with said dies, a pivot pin extendingfat right ansaid U-shap'ed tool holder having a passageway located in the crotch thereof through which said pivot pin passes in order to allow said tool holder to pivot with .relationv to said frame, a segmental holding and guiding member for said headed tools secured at the center thereof to the end of the upper leg of said frame and having a. continuous slot `therein located inalinemfent with saidy dies and passages in ythe tool holder with which the heads of said tools cooperate, a mandrel, means on said mandrel to receive a selected tool from said holding and guiding member, a hand lever pivoted about a iixed aXis in the upper leg of said frame, an eccentric rotated by said handle and a link connected to said -veccentric and mandrel for reciprocating said mandrel. f 2. In a punch of the class described, a U- shaped frame having the legs thereof hori- Zontally disposed, one of saidy legs serving as the base, a U-shaped tool holder of integral construction disposed horizontally' between the legs vof said frame, one of the legs of said tool holder having a'segment integral therewith at the end thereof containing a plurality ofr dies, the other leg of said tool holder having a correspondingsegment provided witha plurality of passages in which are positioned headedr tools for cooperating with said dies, apivot pin` extending at right angles to thelegs of said U-shapedframe and located in the crotch of said `Ushaped frame, said U-shaped tool holder having a passageway located in the crotch thereof through which said pivot pin passes in order to allow said tool holder to pivot with relation to said frame, a segmental holding and n guiding member for said headed tools secured at the center thereof to the end of the upper leg of said frame and having a continous slot therein located in alinement with said dies and passages in the tool holder with which the heads of said tools cooperate,

'a mandrel, means on said mandrel to receive a selected tool from said holding and guiding member, a hand lever pivoted about a fixed aXis in the upper leg of said frame, an'` eccentric rotated by said handle, a link connected to said eccentric and mandrel for reciprocating said mandrel and sight openings disposed in the upper leg of said tool holder to enable the operator to properly center the work -operated upon. i

In testimony whereofI aiiix my signature.

MEDARD F. BOLLAERT.A n 

